<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    div {
      background: url(./images/1.jpg) no-repeat,
        url(./images/2.jpg) no-repeat right top,
        url(./images/3.jpg) no-repeat right bottom,
        url(./images/4.jpg) no-repeat left bottom;
    }
  </style>
</head>

<body>
  <div></div>
</body>

</html>